54C-DIAGNOSTICS ITEM 3

DIAGNOSTIC ITEM 3: Diagnose shorts in the power supply to CAN bus line [CAN-C (Main)].

caution

When servicing a CAN bus line, ground yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a component connected to the CAN bus line may be broken.

TROUBLE JUDGEMENT CONDITIONS

The scan tool MB991958 judges the trouble when it is impossible to receive the periodically sent data and the voltage of CAN_H or CAN_L line is more than 4.0 volts.

TROUBLESHOOTING HINTS

Malfunction of the wiring harness
Malfunction of the connector
Malfunction of the ETACS-ECU
Malfunction of the steering column switch (steering wheel sensor)
Malfunction of the AWD-ECU <AWD>
Malfunction of the occupant classification-ECU
Malfunction of the FCM/LDW/AHB-ECU <Vehicles with FCM>
Malfunction of the SRS-ECU
Malfunction of the TCM
Malfunction of the ASC-ECU
Malfunction of the EPS-ECU
Malfunction of the ECM
Malfunction of the gateway-ECU

DIAGNOSIS

Required Special Tools:

MB991223: Harness Set
MB992006: Extra Fine Probe

STEP 1. Check the CAN-C (Main) bus line. Voltage measurement at gateway-ECU connector C-49.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

note	This inspection allows you to check that there is a short to power supply in either CAN_H line or CAN_L line. Thus, in the following steps, check the CAN-C that is defective.

(1) Disconnect ECM connector B-27, ETACS-ECU connector C-411 and gateway-ECU connector C-49, and measure the voltage at the harness side of gateway-ECU connector C-49.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between gateway-ECU connector C-49 terminal No.3 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between gateway-ECU connector C-49 terminal No.2 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<Both of the measurement results show 4.0 volts or less> Go to Step 30

<Either of CAN_H line or CAN_L line the measurement results show more than 4.0 volts> Go to Step 2

STEP 2. Check the CAN-C (Main) bus line. Voltage measurement at intermediate connector C-128.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

(1) Disconnect the intermediate connector C-128, and measure at its female-side intermediate connector (at the front wiring harness side).

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between intermediate connector C-128 terminal No.13 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between intermediate connector C-128 terminal No.14 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 13

<More than 4.0 volts> Go to Step 3

STEP 3. Check the CAN-C (Main) bus line between joint connector (CAN3) C-24 and the ECM connector B-27. Voltage measurement at joint connector (CAN3) C-24.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .
Strictly observe the specified wiring harness repair procedure. For details refer to .

(1) Disconnect joint connector (CAN3) C-24, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN3) C-24 terminal No.7 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN3) C-24 terminal No.18 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 4

<More than 4.0 volts> Repair the wiring harness between joint connector (CAN3) C-24 and the ECM connector B-27.

STEP 4. Check the CAN-C (Main) bus line between joint connector (CAN3) C-24 and the TCM connector C-131. Voltage measurement at joint connector (CAN3) C-24.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

(1) Disconnect joint connector (CAN3) C-24, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN3) C-24 terminal No.5 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN3) C-24 terminal No.16 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 7

<More than 4.0 volts> Go to Step 5

STEP 5. Scan tool MB991958 CAN bus diagnostics [TCM connector C-131 disconnected]

caution

Strictly observe the specified wiring harness repair procedure. For details refer to

(1) Disconnect TCM connector C-131 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Repair the wiring harness between joint connector (CAN3) C-24 and the TCM connector C-131.

Check the TCM connector C-131, and repair if necessary. If the TCM connector C-131 is in good condition, go to Step 6

STEP 6. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the TCM connector C-131, and repair if necessary. If the TCM connector C-131 is in good condition, replace the TCM.

STEP 7. Check the CAN-C (Main) bus line between joint connector (CAN3) C-24 and the ASC-ECU connector A-03. Voltage measurement at joint connector (CAN3) C-24.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

(1) Disconnect joint connector (CAN3) C-24, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN3) C-24 terminal No.8 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN3) C-24 terminal No.19 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 10

<More than 4.0 volts> Go to Step 8

STEP 8. Scan tool MB991958 CAN bus diagnostics [ASC-ECU connector A-03 disconnected]

caution

Strictly observe the specified wiring harness repair procedure. For details refer to

(1) Disconnect ASC-ECU connector A-03 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Repair the wiring harness between joint connector (CAN3) C-24 and the ASC-ECU connector A-03.

Check the ASC-ECU connector A-03, and repair if necessary. If the ASC-ECU connector A-03 is in good condition, go to Step 9

STEP 9. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the ASC-ECU connector A-03, and repair if necessary. If the ASC-ECU connector A-03 is in good condition, replace the ASC-ECU.

STEP 10. Check the CAN-C (Main) bus line between joint connector (CAN3) C-24 and the EPS-ECU connector C-144. Voltage measurement at joint connector (CAN3) C-24.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

(1) Disconnect joint connector (CAN3) C-24, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN3) C-24 terminal No.9 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN3) C-24 terminal No.20 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Repair the wiring harness between joint connector (CAN3) C-24 and intermediate connector C-128.

<More than 4.0 volts> Go to Step 11

STEP 11. Scan tool MB991958 CAN bus diagnostics [EPS-ECU connector C-144 disconnected]

caution

Strictly observe the specified wiring harness repair procedure. For details refer to

(1) Disconnect EPS-ECU connector C-144 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Check the intermediate connector C-146, and repair if necessary. If the intermediate connector C-146 is in good condition, repair the wiring harness between joint connector (CAN3) C-24 and the EPS-ECU connector C-144.

Check the EPS-ECU connector C-144, and repair if necessary. If the EPS-ECU connector C-144 is in good condition, go to Step 12

STEP 12. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the EPS-ECU connector C-144, and repair if necessary. If the EPS-ECU connector C-144 is in good condition, replace the EPS-ECU.

STEP 13. Check the CAN-C (Main) bus line between joint connector (CAN2) C-202 and the ETACS-ECU connector C-411. Voltage measurement at joint connector (CAN2) C-202.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .
Strictly observe the specified wiring harness repair procedure. For details refer to .

(1) Disconnect joint connector (CAN2) C-202, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN2) C-202 terminal No.11 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN2) C-202 terminal No.22 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 14

<More than 4.0 volts> Repair the wiring harness between joint connector (CAN2) C-202 and the ETACS-ECU connector C-411.

STEP 14. Check the CAN-C (Main) bus line between joint connector (CAN2) C-202 and the column switch connector C-310. Voltage measurement at joint connector (CAN2) C-202.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

(1) Disconnect joint connector (CAN2) C-202, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN2) C-202 terminal No.9 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN2) C-202 terminal No.20 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 17

<More than 4.0 volts> Go to Step 15

STEP 15. Scan tool MB991958 CAN bus diagnostics [column switch connector C-310 disconnected]

caution

Strictly observe the specified wiring harness repair procedure. For details refer to

(1) Disconnect column switch connector C-310 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Repair the wiring harness between joint connector (CAN2) C-202 and the column switch connector C-310.

Check the column switch connector C-310, and repair if necessary. If the column switch connector C-310 is in good condition, go to Step 16

STEP 16. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the column switch connector C-310, and repair if necessary. If the column switch connector C-310 is in good condition, replace the column switch.

STEP 17. Check the CAN-C (Main) bus line between joint connector (CAN2) C-202 and the AWD-ECU connector C-228. Voltage measurement at joint connector (CAN2) C-202.

note	Step 17, 18 and 19 are only for AWD. On vehicles without it, go to Step 20.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

(1) Disconnect joint connector (CAN2) C-202, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN2) C-202 terminal No.8 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN2) C-202 terminal No.19 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 20

<More than 4.0 volts> Go to Step 18

STEP 18. Scan tool MB991958 CAN bus diagnostics [AWD-ECU connector C-228 disconnected]

caution

Strictly observe the specified wiring harness repair procedure. For details refer to

(1) Disconnect AWD-ECU connector C-228 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Check the intermediate connector C-27, and repair if necessary. If the intermediate connector C-27 is in good condition, repair the wiring harness between joint connector (CAN2) C-202 and the AWD-ECU connector C-228.

Check the AWD-ECU connector C-228, and repair if necessary. If the AWD-ECU connector C-228 is in good condition, go to Step 19

STEP 19. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the AWD-ECU connector C-228, and repair if necessary. If the AWD-ECU connector C-228 is in good condition, replace the AWD-ECU.

STEP 20. Check the CAN-C (Main) bus line between joint connector (CAN2) C-202 and the occupant classification-ECU connector D-48-2. Voltage measurement at joint connector (CAN2) C-202.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

(1) Disconnect joint connector (CAN2) C-202, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN2) C-202 terminal No.2 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN2) C-202 terminal No.13 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 23

<More than 4.0 volts> Go to Step 21

STEP 21. Scan tool MB991958 CAN bus diagnostics [occupant classification-ECU connector D-48-2 disconnected]

caution

Strictly observe the specified wiring harness repair procedure. For details refer to

(1) Disconnect occupant classification-ECU connector D-48-2 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Check the intermediate connectors C-17 and D-48, and repair if necessary. If the intermediate connectors C-27 and D-48 are in good condition, repair the wiring harness between joint connector (CAN2) C-202 and the occupant classification-ECU connector D-48-2.

Check the occupant classification-ECU connector D-48-2, and repair if necessary. If the occupant classification-ECU connector D-48-2 is in good condition, go to Step 22

STEP 22. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the occupant classification-ECU connector D-48-2, and repair if necessary. If the occupant classification-ECU connector D-48-2 is in good condition, replace the occupant classification-ECU.

STEP 23. Check the CAN-C (Main) bus line between joint connector (CAN2) C-202 and the FCM/LDW/AHB-ECU connector E-18. Voltage measurement at joint connector (CAN2) C-202.

note	Step 23, 24 and 25 are only for vehicles with FCM. On vehicles without it, go to Step 26.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

(1) Disconnect joint connector (CAN2) C-202, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN2) C-202 terminal No.5 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN2) C-202 terminal No.16 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 26

<More than 4.0 volts> Go to Step 24

STEP 24. Scan tool MB991958 CAN bus diagnostics [FCM/LDW/AHB-ECU connector E-18 disconnected]

caution

Strictly observe the specified wiring harness repair procedure. For details refer to

(1) Disconnect FCM/LDW/AHB-ECU connector E-18 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Check the intermediate connector C-226, and repair if necessary. If the intermediate connector C-226 is in good condition, repair the wiring harness between joint connector (CAN2) C-202 and the FCM/LDW/AHB-ECU connector E-18.

Check the FCM/LDW/AHB-ECU connector E-18, and repair if necessary. If the FCM/LDW/AHB-ECU connector E-18 is in good condition, go to Step 25

STEP 25. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the FCM/LDW/AHB-ECU connector E-18, and repair if necessary. If the FCM/LDW/AHB-ECU connector E-18 is in good condition, replace the FCM/LDW/AHB-ECU.

STEP 26. Check the CAN-C (Main) bus line between joint connector (CAN2) C-202 and the SRS-ECU connector C-126. Voltage measurement at joint connector (CAN2) C-202.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .

(1) Disconnect joint connector (CAN2) C-202, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN2) C-202 terminal No.3 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN2) C-202 terminal No.14 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Go to Step 29

<More than 4.0 volts> Go to Step 27

STEP 27. Scan tool MB991958 CAN bus diagnostics [SRS-ECU connector C-126 disconnected]

caution

Strictly observe the specified wiring harness repair procedure. For details refer to

(1) Disconnect SRS-ECU connector C-126 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Repair the wiring harness between joint connector (CAN2) C-202 and the SRS-ECU connector C-126.

Check the SRS-ECU connector C-126, and repair if necessary. If the SRS-ECU connector C-126 is in good condition, go to Step 28

STEP 28. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the SRS-ECU connector C-126, and repair if necessary. If the SRS-ECU connector C-126 is in good condition, replace the SRS-ECU.

STEP 29. Check the CAN-C (Main) bus line between joint connector (CAN2) C-202 and the gateway-ECU connector C-49. Voltage measurement at joint connector (CAN2) C-202.

caution

A digital multimeter should be used. For details refer to .
The test wiring harness should be used. For details refer to .
Strictly observe the specified wiring harness repair procedure. For details refer to .

(1) Disconnect joint connector (CAN2) C-202, and measure at the wiring harness side.

(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.

(3) Voltage between joint connector (CAN2) C-202 terminal No.4 (CAN_H) and body ground

OK: 4.0 volts or less

(4) Voltage between joint connector (CAN2) C-202 terminal No.15 (CAN_L) and body ground

OK: 4.0 volts or less

(5) Disconnect the negative battery terminal.

Is the check result normal?

<4.0 volts or less> Repair the wiring harness between joint connector (CAN2) C-202 and intermediate connector C-128.

<More than 4.0 volts> Repair the wiring harness between joint connector (CAN2) C-202 and the gateway-ECU connector C-49.

STEP 30. Scan tool MB991958 CAN bus diagnostics [ETACS-ECU connector C-411 disconnected]

(1) Disconnect ETACS-ECU connector C-411 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Go to Step 32

Check the ETACS-ECU connector C-411, and repair if necessary. If the ETACS-ECU connector C-411 is in good condition, go to Step 31

STEP 31. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the ETACS-ECU connector C-411, and repair if necessary. If the ETACS-ECU connector C-411 is in good condition, replace the ETACS-ECU.

STEP 32. Scan tool MB991958 CAN bus diagnostics [ECM connector B-27 disconnected]

(1) Disconnect ECM connector B-27 and read all diagnosis with scan tool MB991958.

(2) Confirm that all diagnosis reading results are as shown in the table.

Are all diagnosis reading results as shown in the table?

Check the gateway-ECU connector C-49, and repair if necessary. If the gateway-ECU connector C-49 is in good condition, go to Step 34

Check the ECM connector B-27, and repair if necessary. If the ECM connector B-27 is in good condition, go to Step 33

STEP 33. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the ECM connector B-27, and repair if necessary. If the ECM connector B-27 is in good condition, replace the ECM.

STEP 34. Scan tool MB991958 CAN bus diagnostics (retest the system)

Diagnose CAN-C (Main) bus line, and check if scan tool MB991958 screen shows normal state.

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Check the gateway-ECU connector C-49, and repair if necessary. If the gateway-ECU connector C-49 is in good condition, replace the gateway-ECU.